Do you need to preheat metal before welding? Preheating steel before welding is necessary for two reasons: First, it raises the overall temperature of the material, which results in a slower cooling rate of the base materials and the weld. If this is not done, the moisture will change phase during welding, and hydrogen will […]
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Why do I get so jealous?
Why do I get so jealous? Jealousy may be driven by low self-esteem or a poor self-image. If you don’t feel attractive and confident, it can be hard to truly believe that your partner loves and values you. Other times, jealousy can be caused by unrealistic expectations about the relationship. Here are some signs of […]
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Why do Emus have 3 toes?
Why do Emus have 3 toes? Each emu foot has three forward-facing toes that allow it to grip the ground, thrusting the bird forward. A powerful kick is also handy for keeping predators at bay. Can you tell an ostrich from an emu? The emu is shorter than its ostrich cousin, reaching anywhere from 5 […]
Why does the pressure build up in a tire on a hot day assume that tire volume is constant *?
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What does crucible mean?
What does crucible mean? 1 : a vessel of a very refractory (see refractory entry 1 sense 3) material (such as porcelain) used for melting and calcining a substance that requires a high degree of heat. 2 : a severe test He’s ready to face the crucible of the Olympics. What is a crucible situation? […]